/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package pl.otros.logview.accept.query.org.apache.log4j.rule;

import pl.otros.logview.LogData;

import java.awt.*;
import java.io.Serializable;
import java.util.Map;

/**
 * A Rule class which also holds a color.
 * 
 * @author Scott Deboy (sdeboy@apache.org)
 * @author Krzysztof Otrebski
 */
public class ColorRule extends AbstractRule implements Serializable {

  /**
   * Serialization id.
   */
  static final long serialVersionUID = -794434783372847773L;

  /**
   * Wrapped rule.
   */
  private final Rule rule;
  /**
   * Foreground color.
   */
  private final Color foregroundColor;
  /**
   * Background color.
   */
  private final Color backgroundColor;
  /**
   * Expression.
   */
  private final String expression;

  /**
   * Create new instance.
   * 
   * @param expression
   *          expression.
   * @param rule
   *          rule.
   * @param backgroundColor
   *          background color.
   * @param foregroundColor
   *          foreground color.
   */
  public ColorRule(final String expression, final Rule rule, final Color backgroundColor, final Color foregroundColor) {
    super();
    this.expression = expression;
    this.rule = rule;
    this.backgroundColor = backgroundColor;
    this.foregroundColor = foregroundColor;
  }

  /**
   * Get rule.
   * 
   * @return underlying rule.
   */
  public Rule getRule() {
    return rule;
  }

  /**
   * Get foreground color.
   * 
   * @return foreground color.
   */
  public Color getForegroundColor() {
    return foregroundColor;
  }

  /**
   * Get background color.
   * 
   * @return background color.
   */
  public Color getBackgroundColor() {
    return backgroundColor;
  }

  /**
   * Get expression.
   * 
   * @return expression.
   */
  public String getExpression() {
    return expression;
  }

  /**
   * {@inheritDoc}
   */
  public boolean evaluate(final LogData event, @SuppressWarnings("rawtypes") Map matches) {
    // no need for color rules to build matches
    return (rule != null && rule.evaluate(event, null));
  }

  /**
   * {@inheritDoc}
   */
  public String toString() {
    StringBuffer buf = new StringBuffer("color rule - expression: ");
    buf.append(expression);
    buf.append(", rule: ");
    buf.append(rule);
    buf.append(" bg: ");
    buf.append(backgroundColor);
    buf.append(" fg: ");
    buf.append(foregroundColor);
    return buf.toString();
  }
}
